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L. O. HOWARD. Hi In Iniiil and Chi<-( o( Bureau. 




Entomological Aisitl 

. -13 

i OFFICE : 1111 



L. O. Howard, Entomologist and Chief of Bureau. 

C. L. Mablatt, Entomologist and Acting Chief in Absence of Chief. 

R. S. Clifton, Executive Assistant. 

W. F. Tastet, Chief Clerk. 

F. H. Chittenden, in charge of truck crop and stored product insect investigations. 

A. D. Hopkins, in charge of forest insect investigations. 

W. I>. Huntlr, in charge of southern field crop insect investigations. 

F. M. Webster, in charge <,f cereal and forage insect investigations. 

A. L. Quaintance. in charge of deciduous fruit insect investigations. 

E. F. Phillips, in charge of lice culture. 

I). M. Rogers, in charge of preventing spread of moths, field work. 
Rolla P. Currie. In charge of editorial work. 
Mabel Colcord, in charge of library. 

Southern Field Chop [nsect Investigations. 

W. I>. Hunter, in charge. 

W. I>. Pierce, J. D. Mitchell. G. I). Smith. B. A. McGregor. Harry Pinkus, 


engaged in cotton-boll weevil investigations. 
A. ('. Morgan. G. A. Runner, S. E. Crumb, D. C. Parman. engaged in tobacco 
insect investigation. 

F. C. Hishopp. A. H. Jennings, II. P. Wood. W. V. King, engaged in tick investi- 

T. E. IIolloway, E. R. Barber, engaged in sugar-cane insect investigations. 

J. L. Webb, engaged in rice insect investigations. 

It. A. Cooley, D. L. Van Dine, a. F. Conbadi, C. C. Kbumbhaab, collaborators. 


CIRCULAR No. 170. .], i;tl 

United States Department of Agriculture, 

L. O. HOWARD. Entomologist and Chief of Bureau. 


i i rgaa mintatus Kocb. t 

By I' i ' Bishopp, 
Entomological I isistant. 

1 \ 1 Ki 'IH ( lh i\. 

Among ilif many problems which confront the poultry raiser in 
the southwestern portion of the United States none surpasses in im- 
portance that of the fowl or chicken tick (Argas miniatm Koch). 
The statement has been made by reliable authorities that chicken rais- 
ing in certain localities in southwestern Texas is pract ically prohibited 
by this pest. It is very common to meet people in many sections of 
thf infested area who have disposed of their poultry mainly on ac- 
count of tin- Losses caused by thi> tick. The damage occasioned to 
the man who is raising poultry on a considerable scale is very -mall 
when compared with the losses sustained by the hundreds of indi- 
viduals in town and country who keep a few fowls for home use. 
This is partly due to the Lack of attention given to their poultry by 
those who do not attempt to go into the industry commercially. 

It is difficult to make a reliable estimate of the damage chargeable 
to the fowl tick, as much of the Loss is indirect or complicated with 
damages produced by other causes. There is do doubt, however, 
the total Loss duo to the pest amount.- to many thousands ol dollars 


A tick which many authorities consider identical with our Ameri- 
can form was briefly described by Oken in 1818 from specimens col- 
lated in Persia. In 1844 a German investigator, Koch, described 
specimens from Demerara, British Guiana. The latter were un- 
questionably of the same species as the tick which occurs in the Unite 1 

1 Submittal by permission a- a minor thesis for the at the 

Colorado Agricultural College. 



States. Our earliest record of the occurrence of the fowl tick in 
this country was published in 187:2 by Dr. A. S. Packard. This was 
based upon a collection of ticks made by Mr. G. W. Belfrage in 
southwestern Texas. Dr. L. O. Howard ' states that Mr. F. G. 
Schaupp sent specimens of this tick to the Bureau of Entomology 
in November, 18*4. At that time it was said to he a severe pest to 
chickens in Dimmit County. Tex. Mr. Albert Turpe stated that 
the tick appeared in Kinney County. Tex., in 1892, but Mr. Ferdi- 
nand Hoehr averred that it had been present in that county since 
1888. According to a statement of Prof. C. M. "Weed published in 
the Prairie Farmer. January 7. 1SSS. Mr. George H. Trook sent in 
specimens of this tick from Maricopa County. Ariz., with the in- 
formation that they were troubling chickens in that section. Dur- 
ing December, 1894, Mr. C. II. T. Townsend found the pest infesting 
chickens at San Diego. Tex., and earlier in the same year Mr. E. M. 
Ehrhorn reported it as attacking chickens and turkeys at Merced, 

It has not been possible to secure reliable data on the early history 
of the pest from residents in the infested territory. It seems jn'ob- 
able that it has existed in southwestern Texas for many years and 
was probably introduced from Mexico at the time of the colonization 
of the State b}' the Spanish who came in from that country. Further- 
more, it has not been firmly established whether the species has been 
spi'eading northward in Texas, although the belief that a gradual 
spread has taken place has been expressed by Prof. E. D. Sanderson. 
It is certain, however, that the tick is becoming more generally dis- 
seminated throughout the infested territory along with the settling 
up of the Southwest. 


The chicken tick, "blue bug." "bloodsucker." or •"tampan." as it 
is called in different localities or regions, is a widely disseminated 
species. In the United States it is infrequently met with outside of 
the semiarid and arid Southwest. However, it has been reported a 
number of times from Florida, and the Marx collection in the United 
States National Museum contain- specimens from Iowa. The collec- 
tion of the Bureau of Entomology contains specimens from a corre- 
spondent at Fort Lauderdale, Fla.. where the tick was said to be 
injurious, and Mr. G. A. Runner found the specie- in numbers at 
Key "West, Fla. In this country, as has been indicated, this tide 
occurs in greatest abundance in the warm portions of the arid and 
semiarid region. A careful study of its normal distribution in Texas 
shows that it does not extend far eastward into the region where the 
annual rainfall exceeds 30 inches. This makes the eastern t'd^ of its 

1 Insect Life, Div. Km., U. S. Dept. Agr., vol. 7, p. 418, 1S95. 

I II I I n\\ I IKK. 

range coincide closely with :i line dividing one of our life zones, 
known as the Lower Austral, into the Lower Sonoran and Austrori- 
parian Faunas. 

The map (fig. I) shows approximately the normal distribution of 
tlif species in the Onited States. It is b serious pest throughout tin- 
greater pari of western Texas, southern New Mexico and Arizona, 
southern and western California, and on the great plateau of north- 
central Mexico and in other pari- <>f that country. In many other 
regions of the n orld this tick is of important 1 nemj of poultry. 

It appears t" occur commonly in Persia, [ndia, southern Russia, 

rowl ti.i, \tut) Id the On (The 

large dots Indl 
Entomology The Bmali within the 

I'm - Dal.) 

Roumania, North and South Africa, various parts of Australia, the 
West Indie-. Mexico. Panama, British Guiana, and Brazil. 

There appears to be no reason why the species may not become 
established in all of our Gulf States, as it occur- in other countries 
which have very similar climate-. However, it will probably never 
become a pe-t of continuous importance in the States east of Texas 
on account of their humid climate-. There is little danger of the 
establishment of the species in the more northern State-, anil the 
cases where it is occasionally found outside <>f the area of normal 
occurrence must be considered as temporary infestations brought 


about by the introduction of the tick on fowls or in coops from in- 
fested regions. If favorable conditions exist at the time of introduc- 
tion the tick may breed and become of some importance as a pest for 
a short period, but sooner or later it is so checked as to be of little 
consequence or it dies out completely. 


Although the chicken is the host most frequently attacked by this 
species, a considerable number of other domestic fowls may be 
troubled by it, and turkeys, geese, ducks, pigeons, ostriches, and 
canaries have each been found to suffer from its attack. During this 
investigation a few larva? of this species have been found in southern 
Texas on the meadowlark (J. D. Mitchell) and on wild turkey (F. C. 
Pratt). It has also been reported to have been collected, in rare 
instances, on cattle and jack rabbits, and experimentally it has been 
induced to feed upon rats and mice. In Persia this tick, which is 
known as the " miana bug," has a formidable reputation. It is said 
to attack man with avidity in that country, and early writers report 
very serious effects produced by its bite. In some cases it was accused 
of producing death within 20 hours. These statements are no doubt 
overdrawn and other species of a closely allied genus (Ornithodoros) 
may have been confused with this one. Prof. Lounsburv. in South 
Africa, allowed specimens to feed upon his arm and experienced no 
,-erious results. In this country we have had no authentic reports 
of this pest attacking man. 


As a result of the presence of this creature loss is sustained in 
several wa} 7 s: (1) Through death, which may occur among poultry 
of all ages; (2) by the lowering of the vitality of the fowl so as to 
make it readily susceptible to disease; (3) by greatly reducing e<yg 
production; (4) by stunting the growth of chickens; and (5) by 
disturbing setting hens. 

Death may be produced in two ways. First, by gross infestation, 
which drains the fowl of blood and produces intense irritation similar 
to " tick worry." caused by the cattle tick and other species among 
the larger domestic animals. This difficulty is most apparent when 
chickens are placed in coops which have not been occupied for several 
months. The ticks are extremely hungry, attack the fowls in great 
numbers, and soon weaken them to such an extent that they are 
unable to get on the roost. When the chickens are thus weakened 
they more readily fall victims to the ticks. In some cases the infested 
fowls appear paralyzed, being unable to use the legs. The wings 
droop, the feathers have a milled appearance, the appetite is lost, and 
the fowl may die as soon as two or three days after the first attack. 

l in. i OWL IKK. 5 

In Ices severe infestations, when the fowls are \<r\ hearty, they may 
droop for some time, or, if removed from further infestation, quickly 

ond, death may be produced 03 specific disease which has been 
proven to be carried l>\ the chicken tick. This malady, which is 
known a- spirochetosis, has been proven to exist in many countries 
where the chicken tick occurs, namely, in India, Egyptian Sudan, 
Transcaucasia, Roumania, Tunis, Algeria, Rhodesia, South Australia, 
Brazil, and Martinique. It is also probable that the disease occurs 
in other islands of the West Indies. A disease with many of the 
symptoms of spirochetosis occurs among chickens in the southwestern 
part of the United State- and in Mexico. The fowl tick has been 
found associated with this disease. These points strongly indicate 
that the malady in question i- (lie t ick-tran-mitted spirochetosis 
known in other countries, although thi- remains to be definitely 
prov e d. 

It i- readily -een how the weakening effect of the blood loss pro- 
duced by this species may encourage the development of various dis- 
eases. It ha- been shown by certain authorities that, in feeding, this 
tick introduces a substance called anticoagulin into the wound 
produced by the insertion of the mouth parts. This substance and 
possibly other secretion- seem to produce acute inflammation at the 
point of attack, and" when the infestation is heavy the inflammation 
a 1 - well a- the loss of blood is an important factor in reducing egg 

The continued drain upon the Systems of chicken- from the time 
they are hatched until full grown is sufficient to accounl for the re- 
duction in the size of poultry raised in t ick-infe-ted houses. 

The irritation produced upon setting hen- by the attack of the tick 
in it- different stages frequently interfere- with successful hatching, 
in some instances even causing the hen- to desert their nests. 


The habits of the fowl tick are very similar to those of the bed- 
bug (( "iiiK.r lectulariua L. 1. It is almost exclusively a night feeder. 
Because of this habh of engorging on fowls during the night and 
biding in the daytime many people do not suspect the presence of 
the tick until serious loss has been sustained. 

The life history of this species is considerably different from that 
of the ticks ordinarily observed on the farm. The e<ri_ r - are small, 
oval, brownish objects, and are deposited in the crack- and crevices 
about the roosting place- of the fowls. During warm weather they 
hatch in from 1 « ' to 1." days. Tn the winter the hatching period may 
exceed three month-. The minute six-legged seed ticks or larva? 
which emerge from the eL r i_ r - are very diff appearance from 


PIG. 2. — A seed tick, the larva of 
tin' fowl tick, as seen from be- 
neath. Greatly enlarged. (Orig- 
inal, i 

the full-grown ticks. A tick in this stage, as seen from l>eneath, 
is shown in figure 2. The seed ticks are light gray in color ami the 
mouth parts can be seen projecting in front of the body. Follow- 
ing hatching they remain quiet on the eggs for a few days and then, 

after nightfall, begin actively running 
about in search of a host. When a suit- 
able host is found they bury the rather 
long beak in the skin and begin sucking 
blood. Their favorite places of attach- 
ment are on the breast and thighs and 
under the wings, but they may be found 
on nearly all parts of the fowl. After 
feeding has begun they soon become 
dark blue in color and the body gradu- 
ally become- distended and rounded. 
The fully engorged seed ticks are about 
one-tenth of an inch in length and are 
usually of a dark-blue or purplish color. 
When fully engorged the seed ticks 
drop from the host. These ticks have 
acquired the habit of dropping from the 
host during the night. It is thus possible for them to find hiding 
places in the immediate vicinity of the chicken roost. The time 
required for the seed ticks to engorge has been found to range from 
3} to 10 days. 

In from 4 to 9 days after 
dropping from the host the 
engorged seed ticks molt 
their skins and" acquire a 
fourth pair of legs. In cool 
weather this transformation 
sometimes requires slightly 
over a month. In this stage 
the ticks are known as 
nymphs (fig. 3). They are 
slightly larger than the en- 
gorged seed ticks but are 
very much flatter. In this 
and all subsequent stages the 
ticks feed almost exclusively 
at night and do not require 
more than from a few minutes to an hour to become filled with blood. 
This enables them to partake of their meal and thoroughly secrete 
themselves in the cracks during the night and thus escape destruction 
by the host. Before becoming mature the nymphs feed and molt 

Fig. •". — Nymph of the fowl tick, as seen from 
below. Greatly enlarged. (Original.) 

THE I iiu i i M'K. 


v - > 

their -kin- twice and sometimes three times. During these succes- 
live « i iii< >ruii i if 1 1 1 ~ ami tnol tings the ticks increase considerably in 
lize i>ui maintain the oval, flattened 

At the last moll the sexual organs 
are developed. The male- i fig. I i are 
slightly smaller than the females i fig. 
5), i he former measuring about one 
fifth of an inch ami i be latter about 
one fourth of an inch in lengl h. 
Before feeding tin' adults arc 
yellowish brown color and arc very 
thin. After partaking of M<><><| they 
change t<> dark blue and the size in- 
creases considerably. The bodii 
the male- do not distend as much as 
those of the females. In the adult 
stages, as also in the nymphal stages, 
the mouth parts arc located on the 
underside of the front end of the 
body. They are not usually visible 
from above. The body is quite leath- 
ery and exhibits a cellular appearance with radiating row- of rather 
smooth, irregular disks. Mating take- place immediately alter en- 



: ! i i 

■ beneath. N te 

hind itac mouth] 
1 • [lnal. i 

Fig. 5.— Female of the fowl tick, as Been from :<h.>\.- and bem ith. (S 

genital opening just behind the moothpai glnal.) 

gorgement, and the female- begin to deposit eggs in from I to 1" days 
later. Often during the winter the female- do not deposit for long 


periods and sometimes require a second engorgement before egg 
laving begins. 

Unlike many species of ticks, the female does not die upon com- 
pletion of the first deposition, but again fills with blood and produces 
another batch of eggs. This process of feeding followed by deposi- 
tion may take place as many as seven times, the average number 
being about three or four. The largest number of eggs which we have 
observed to be deposited by a single female is 874 and the average 
number 537. It will thus be seen that although deposition takes 
place a number of times, the total number of eggs produced is con- 
siderably smaller than the number deposited by many of our common 
species of ticks. For example, the average number of eggs deposited 
by the cattle tick is between 3.000 and 4.000. As has been stated, the 
eggs are to be found in small clusters associated with all stages of 
the tick in the cracks and crevices about the chicken house. 

One of the most remarkable features of the life history of this 
creature is its great length of life without food. The seed ticks have 
been found to live for a period of 5| months. Ticks in the first 
nymphal stage may live for slightly more than 9 months, those in the 
second nymphal stage for about 15 months, and those in the adult 
stage for nearly -2i years. In each of the>c cases the specimens ob- 
served were kept in tight boxes and no food was given. Other ob- 
servers have recorded still greater longevity among adults of this 
species. Some of them state that the tick may live over 3 years with- 
out food. Dr. C. V. Riley has published a statement to the effect that 
they have been observed to live some 5 years without food. Our 
observation upon hundreds of individuals indicate that there must 
be some mistake about this record. 


The eggs of this tick hatch into larvae in from 10 to 100 days. The 
seed ticks, or larva?, attach to a fowl and feed from 3£ to 10 days, 
after which they drop from the host, mainly at night, and secrete 
themselves in protected places. During warm weather the skins of 
the seed ticks are molted in from 4 to 7 days and the eight-legged 
nymphs appear. The second engorgement, which always occurs at 
night, requires only a few bonis at most, after which the ticks again 
secrete themselves and molt their skins. The third engorgement 
also occurs at night, as do all subsequent feedings. Following this 
engorgement the ticks require 11 or more days in which to -bed 
their skins. About six-sevenths of the resulting ticks are now 
mature. These are ready for depositing eggs after another engorge- 
ment and mating. The other one-seventh of the individuals are 
still nymphs after the third molt and must of necessity feed once 

I III. i <<\\ i i I' K. 9 

mors and moll their - K 1 1 1 - again before becoming adults. The last 
oymphaJ molt in this case has been found t<> require 9 or more days. 
The adults are ready for engorgement booh after 1 1 * « - last molt, and 
deposition begins after mating has taken place. As man] as seven 
engorgements and depositions have been observed, an average ot 537 
being deposited by each female tick. 
The number of generations of the chicken tick annually has not 
hem determined. Ii is possible for the tick to develop through all 
of it- Btages ami thus complete it- life cycle in about K) 'lay-. Nor- 
mally, however, it probably takes at least tw< nth-, in warm 

weather, tor this complete transformation. Although breeding con- 
tinues through tlif winter it i- greatly retarded during the coolest 
weather. It i- c-timated that about ti\e generations occur annually 
in the southern part of the range of the tick. 

\ \ n l: \i \(.i Mir- O] CON! ROL. 

\- has been pointed out. this tick doe- not thrive in portions of the 
Southern State- which have a humid climate. This fait, together 
with experimental evidence, indicate- thai the species is largely con- 
trolled by excessive moisture. It has also been found that the in- 
jury indicted by the species i- greatest during hot. dry seasons. It 
also appear- thai low temperature- are important in reducing the 
rapidity of multiplication and other activities, and that where very 
cold winter- occur the tick doe- not exist. 

The >peeie- i- singularly free from natural enemies. The little 
hlack ant (Monomorium minutum) ha- been -ecu carrying off the 
eggs and larva?, ami some of the house-inhabiting spiders probably 
destroy limited numbers of the tick in the later stages. Rats and 
mice are also concerned in it- destruction in these stages. Chicken- 
eat the tick with avidity when they have access to it. However, it 
i- greatly protected by it- habits id' night feeding and of crawling 
deeply into crack- during the day. These habits also make it prac- 
tically exempt from destruction by insectivorous birds. 

\ 1 ROL Ml \-l R] -. 

It i- much easier to exclude the fowl tick from premises which are 
not already infested than to eradicate it after an infestation ha- he- 
come established. Hence it i- advisable, when poultry raising i- 
beinir started, to choose a site some distance from where chicki 
have roosted. If it i- possible to have the entire poultry farm well 

separated from other farm- the exclusion of the tick i- made more 
certain. No chicken-, or coop- which have contained chick, 
should he hroiicrht near the site of the new yards. This demai 


the use of the incubator for starting and replenishing the flock. 
When the chicken yards are built in proximity to infested premises 
extreme care should be exercised by the poultryman to exclude his 
fowls from these premises, as well as to prevent foreign poultry 
from entering the tick-free yards. Frequent and careful inspections 
should also he made of chicken houses to be certain that an infesta- 
tion has not occurred from unguarded sources. If it is desired to 
bring stock in, tins should be kept quarantined at some distance from 
the chicken yards for 10 days. The temporary coops in which the 
poultry is kept during this period should then be burned or dipped 
in boiling water to insure the destruction of all ticks. As has been 
stated under the discussion of the life history of this species, the 
seed ticks may remain attached to the host for a period of 10 day-, 
hence the recommendation that fowls be quarantined for that period. 
At the expiration of the 10 days all of the ticks will have dropped 
and hidden themselves in the cracks of the coop. They may then be 
destroyed by the methods mentioned. "When poultry is to be moved 
from an old chicken house into a new one the same method of free- 
ing them from ticks should be employed. 


It is of much importance to determine as early as possible whether 
or not the fowl tick is present in the chicken house. Oftentimes the 
small blue seed ticks are observed upon the skin of poultry which is 
dressed for consumption. The presence of these little parasites 
should always cause the owner to turn his attention to the chicken 
coops. Whenever the combs and gills of chickens appear pale or 
signs of weakness are exhibited the cause can often be ascertained by 
making an examination of the roosting places. Frequently severe 
losses are sustained without the presence of the pest becoming known 
to the poultryman. It is therefore necessary to make frequent care- 
ful examinations of the cracks in the vicinity of the roosts to deter- 
mine if an infestation exists. When ticks are found it is important 
to determine how extensive is the infestation and where the majority 
of the ticks are. If many specimens are found in all parts of the 
building and if the structure is of little value, the easiest and surest 
way of destroying the pest is to burn the entire chicken house. If, 
however, the ticks are not to be found in all parts of the building and 
if it is of too much value to be destroyed, other methods of fighting 
the tick should be adopted. In the first place all unnecessary boards 
and boxes which form protection for the tick should be removed. 
The house should then be thoroughly sprayed with pure kerosene, 
crude petroleum (Beaumont oil), creosote, or some of the standard 
tick dips used at a strength of 1 part of the dip to 3 parts of water. 
A thorough spraying with whitewash containing carbolic acid has 

I hi i !'\\ L TICK. 11 

:il-o been recommended. Man) other destructive agents have been 
employed \\ nli greater or less success; among these are boiling water, 
creosoted products, and strong kerosene emulsion. The application 
• it" hot tar to the interior of infested houses has given some relief From 
the pest in certain instances. The tar tends to lill up the cracks and 
to seal up i he i icks already in them. 

When chickens are found to be suffering From the attach of the 
tick they should be removed immediately From the house in which 
the ticks occur. It is possible i<> destroy many of the larvae which 
are attached to the bird, but as a rule it is sufficient to -hut the 
affected chicken up and allow the larvae t" he,, me engorged and drop 
off. In case chickens become very weak From attack before the 
trouble is located it is advisable to apply kerosene and lard to the 
underside of the wings and breasts in order to destroy some of the 
larva? already attached. Practically all of the seed ticks on the 
chickens may be destroyed by submerging them in one of the creosote 
dips, mixed with water in the proportion of l to 1°. Plunging in- 
Fested Fowls into gasoline has been Found to destroy every tick 

attached to them, but this treatment is too harsh on the host to be 

recommended. In general, dipping of the birds is inadvisable, as 

that treatment i- rather severe, ami usually it' the chickens are kepi 
From further infestations they soon recover From the attack. 

The chicken tick- ha- been Found to be one of the mosl difficult 
form- of animal life to destroy. It i- able to survive applications 
which would kill practically any Form of insect life. Insect powder, 
kerosene emulsions, and creosote dip- w^r<\ at the ordinary strength 
and Fumigation with such poisonous substances a- hydrocyanic-acid 
gas are entirely inadequate t" destroy tin pest. On account of the 
ability of the ticks to crawl far into very narrow cracks it i- prac- 
tically impossible to strike all of them with any substance applied. 
This oecessitates the repetition of the treatment at intervals of a 
k or 10 day-, until the tick i- brought well under control. 

Numerous devices have been used or advocated tor protecting 
chickens from tick attack. Among the contrn at ces For isolating the 
roosts may he mentioned wrapping the end- of the poles in waste or 
cotton soaked in petroleum and supporting the roosts by means 
rods running through cup- filled with kerosene or other deterrent 
material. If these method- are employed For protecting the poultry 

Care should he taken to keep the repellent -uli-taiee- Fresh and n« t to 

allow the dust to accumulate on the top. In any event the roosts 

should he smooth and free from hark and crack- -<. as not to furnish 

hiding place- for the ticks. They should al-o he arranged so a- \<> he 

ly removed to permit of cleaning the house ami applying petroleum 

or creosote around the end- of the r< • -t- ami other place- where the 

tick.- are most apt to hide. Gasoline torches have been used in de- 


stroying ticks with some success. This method is very effective in 
eradicating the pest from noninflammable buildings such as are dis- 
cused under "tick-proof houses.*' .1 very simple and inesapem 
method of protecting fowls from the tick is to suspend the roosts by 
means of small wires from the ceiling. Wires should < be run 
from the roost to the side of the building in order to prevent the 
framework from touching at any point. This arrangement in vari- 
ous forms is being used by a few chicken raisers in many localities, 
and in most cases with marked success. The method is inexpensive, 
can be adapted to any kind of chicken house, and requires only suffi- 
cient attention to make certain that the roosts and roost frames 
themselves do not become infested. 

As has been stated, the longevity of this species is so great that 
this method alone can not be relied upon to kill out the ticks already 
in the building, as a few of them are certain to become engorged 
on setting or laying hens, or on chickens which remain on the ground, 
and thus keep the infestation alive. In view of these facts it is 
recommended that along with the suspension of the perches on wires, 
spraying or mopping with petroleum or creosote be practiced. 

For the most part conditions throughout southwestern Texas and 
other parts of the infested territory are favorable for the breeding 
of this pest. Cedar posts which are covered with bark and filled 
with deep crevices are extensively used in and about the chicken 
houses. In some cases the chickens are compelled to roost in trees 
and about barns owing to the erroneous idea that by this method they 
will escape the chicken ticks which are usually concentrated in the 
chicken houses. This practice only serves to scatter the ticks about 
the premises and often induces infestations of the barns, trees, and 
fences. This makes it possible for the ticks to get on the chickens in 
any place about the yards and practically prevents successful control. 
"Where poultry commonly roost in trees it is a good policy to remove 
all of the loose bark from the trees used as roosting places and to fill 
all holes and crotches in them with tar. 

The whitewashing of building- and general cleanliness maintained 
in order to keep the chicken tick in check are of much advantage in 
warding off' some of the diseases to which poultry is subject. Many 
of the control methods advocated are of decided importance in com- 
bating other poultry pests. Applications of tickicides to chicken 
houses are sure to destroy the chicken mite (Dermanyssus gaffincB 
Kedi), which has a habit, very similar to that of the chicken tick, of 
hiding in the cracks. These applications also aid in controlling the 
chicken flea (Scercopsylla (jail "■ naa a Westw.), which is of consider- 
able importance in certain sections of thi> country. 

Tin i<>\\ i TICK. 18 

Til K moot Hot si s, 

When it is planned to construct u>-w quarters for poultry the matter 
of protection from this pest should be kept in mind. It is possible to 
build chicken houses which are practically tick proof; moreover, the 
cost <>f building ;ui<l maintaining such structures does not greatly 
exceed the outlay necessary t<> construct m house which would favor 
tick 'lc\ elopment. 

Rouses can be built of a variety of different materials bo as to 
make it very easy to control thi- pest It* it seems desirable to build 

;i frame structure ;ill parts should be made of smooth | ber and care 

.should be taken to furnish the least possible number of hiding places 
for tin* tick-. Shingle roof- when once infested are exceedingly diffi- 
cult t<> riil of ticks. It i> therefore advisable to make the roof of cor- 
rugated icon. tin. or one of the patent roofings. 

The all-metal chicken house has many advantages over wooden or 
partially wooden structures. A number of such houses built mainly 
of metal are in use in southwestern Texas and have been found prac- 
tically tick free, although no precautions were taken against intro- 
ducing ticks with the poultry or of treating the inside of the houses. 

In constructing a poultry house the individual need- largely gov- 
ern the style and size of the structure. The cost of material- required 
for an all-metal house 11 feet long, 1" feel wide, and 7 feet high in 
front, with a roof sloping one way. has been found to amount to about 
These figures are based on the use of three-fourths inch piping 
for the framework and painted corrugated iron for the covering. The 
difference in price of painted and galvanized iron is considerable, the 
former being about $2.40 per square and the latter about $3.50. The 
painted iron will be found satisfactory for use at inland points, tts 
life may Ih> increased by applying an occasional coat of paint. In the 
construction of the frame it i- necessary i" have the piping cut to 
the required lengths and threaded. The large number of -hurt pieces 
of piping and the considerable number of crosses, elbows, and T's 
make the assembling of the frame rather difficult. Where angle iron 
is available it is more desirable and costs no more. The corrugated 
iron may then be riveted on or cleated on ;i- would he done if the 
piping frame wen- used. Wooden frames may Ih> employed if the 
metal is too expensive or difficult to obtain. When wooden frame- 
are used it is best to put the framework on the outside of the -In i 
ing. These corrugated iron houses are very hot during the day and 

therefore -hade, other than that afforded by the hoii-e-. should l>e 
provided in the chicken yard-. This extreme heat and the lack of 
protection are the essential factor- in keeping the chicken tick out. 
The tick will never become a serious nuisance in an all-metal house 
if protection, such as loose boards, nests, etc., i-. not given it. Never- 


14 the fowl T 3 1262 09216 5538 

theless it is advisable to avoid introducing the pest, if possible. The 
complete destruction of the tick, should it become established in a 
metal house, is easily accomplished by removing the roost and burn- 
ing a considerable quantity of straw, paper, or other light material 
within the house. All parts of the house should be thoroughly heated 
or reached by the flame. As has been stated the roosts should always 
be arranged to permit of easy removal for cleaning and other pur- 

It is recommended that nests be located apart from roosting places. 
Tick-proof nests or boxes isolated by means of legs set in dishes tilled 
with kerosene are desirable. If. however, the nests are made of 
ordinary boxes and not allowed to come in contact with any walls it is 
seldom that they will become infested to any degree if thoroughly 
cleaned out occasionally. Should these boxes become infested they 
can be destroyed with little loss. Metal nests may be made with a 
ring of small iron to which is attached a sort of basket made of wire 
netting. These nests may be thoroughly cleaned by burning the 
straw which they contain and holding the wire part over the blaze. 
In the infested territory brooders and pens should be selected or con- 
structed with a view to lessening hiding places which may be occupied 
by this pest. 

That the fowl tick can be kept completely out of a poultry farm 
has been demonstrated conclusively by a few progressive poultrymen 
in Texas, but this is the reward of scrupulous cleanliness and con- 
stant vigilance. 

Approved : 

James Wilson, 

Secretary of Agriculture. 
Washington, D. C.. January 18, 1913. 

ADDITIONAL COPIES of this publication 
-ii- may be procured from the Superinteni>- 
Ent of DOCUMENTS, Government Printing 
Office, Washington, D. C, at 5 cents per copy